body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

#game-board {
    width: 400px;
    height: 400px;
    background-color: #000;
    position: relative;
    overflow: hidden;
}

.snake-part {
    width: 20px;
    height: 20px;
    background-color: #0f0;
    position: absolute;
}

.food {
    width: 20px;
    height: 20px;
    background-color: #f00;
    position: absolute;
}